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OSDV900001
DVD PLAYER
DV-900
MAY, 2006
DV-900 Service Manual
DV-900 Service Manual
Table of Contents
General Section
Cautions/Warnings
Safe Warnings
Precautions
Software Upgrade
Circuit Diagram and Component Layout
MPEG IC Block Diagrams
Power supply Circuit Diagram and Component Layout
MPEG Circuit Diagram and Component Layout Front
panel Circuit Diagram and Component Layout
Servicing Procedures
Power Supply Trouble Service Flow Chart
Read Disc Trouble Service Flow Chart
Video Trouble Service Flow Chart
Composite Analogy Audio Trouble Service Flow Chart
Digital Audio Trouble Service Flow Chart
Front Panel Trouble Service Flow Chart
Remote Control Trouble Service Flow Chart
Parts List
Power parts list
MPEG parts list
AV Output parts list
Front panel parts list
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DV-900 Service Manual
1. General Section
1.1. Cautions/Warnings
1.1.1. Product Safety Notice
Parts marked with the symbol____ in the schematic diagram have
critical characteristics.
Use ONLY replacement pares recommended by the manufacturer. It
is recommended that the unit be operated from a suitable DC supply
or batteries during initial check out procedures.
1.1.2. Leakage Current Check/Resistance Check
Before returning the unit to the customer, make sure you make either
(1) a leakage current check or (2) a line to insulated resistance
check.
If the leakage current exceeds 0.5 milliamps, or if the resistance from
chassis to either side of the power cord is less than 240 K ohms, the
unit is defective.
WARNING: DO NOT return the unit to the customer until the
problem or located and corrected.
1.2. Safe Warnings
1.2.1. Protection of Eyes from Laser Beam
To protect eyes from invisible laser beam during servicing
DO NOT LOOK AT THE LASER BEAM
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1.2.2. Laser Caution
CAUTION
Adjusting the knobs, switches, and controls, etc. or taking actions
not specified herein may result in a harmful emission of laser beams.
This CD Changer must be adjusted and repaired only by qualified
service personnel.
Laser symbol:
THIS IS COMPACT DISC PLAYER IS CLASSIFIED AS A CLASS 1 LASER
PRODUCT.
THE LASS 1 LASER PRODUCT LABEL IS LOCATED ON THE REAR EXTERIOR.
1.3. Precautions
1.3.1. ESD Precautions in Repairing
1.3.1.1. Do not apply excessive pressure on the mechanical parts
(moving pares), including the Pickup Block, as extremely
high mechanical precision or required in these parts.
1.3.1.2. When soldering the microprocessor and signal processing
IC's, use a ceramic soldering iron or a soldering iron whose
metal part is grounded since they are not resistant to static
electricity.
1.3.1.3. When removing the solder or soldering the laser shorting
lands for the Pickup Block, use a ceramic soldering iron or a
soldering iron whose metal part is grounded since the laser
diode or not resistant to static electricity.
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1.3.2. DVD Loading Unit Precautions when handling the Mechanism
Block
1.3.2.1. Do not loosen any screws in the Pickup Block.
1.3.2.2. Do not adjust any screws in the Mechanism Block except for
"Tilt Adjust Screws", as they are adjusted precisely at the
factory.
1.3.2.3. Replacement of the Pickup Block is impossible. Always
replace the Traverse Ass'y when the Pickup Block needed to
be replaced. Do not touch the lens or lens holder of the
Pickup Block.
1.3.2.4. The Guide Rails of the Pickup Block are greased. Take care
when handing.
1.3.2.5. When you try to slide the Pickup Block, do not press or pull
it directly. Always turn the dive gears with your fingers. 1.3.2.6. Be
sure that the anti-slipping rubber on the turntable or
clean. If there is dust or it is greasy, clean the part with the
liquid that contains 50% each of alcohol and water.
1.3.2.7.When removing the Mechanism P.C.B. Ass'y, you need to
short-circuit the laser diode shorting lands beforehand.
1.4. Software Upgrade
You can upgrade DVD Player using the software we provide as following step:
Creating a software upgrade CD
Use only a new CD-R/CD-RW(not an erased one).
Give the CD a name of your choice(e.g. version and unit name).
Burn the unpacked documents on the CD-R/CD-RW.
The root directory(uppermost level) of the software upgrade CD
Attention: If a failure should occur during the software upgrade (e.g. a mains failure), it may
happen that the units function and a restart of the upgrade function are no longer possible. If
this should be the case, you must replace the intergraded FLASH ICs with preprogrammed
ICs (see corresponding spare parts list).
Insert the upgrade CD (see corresponding spare parts list) and observe the hints on the
display and on the screen of the TV set.
Carry out an initialization of the set.
Displaying the Software Version Number
Press one after the other the "STOP" and "EJECT" buttons on the unit.
Press the"OSD" with the remote control.
Using the cursor buttons on the remote control, select the software version "MICRO
Version" or "CUSTOMER VERSION" .The respective software version number then is
displayed
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DV-900 Service Manual
2. Circuit Diagram and Component Layout
2.1. MPEG IC Block Diagrams
Fig. 2-1 MT1389D
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Fig. 2-2 Functional block diagram
Fig.2-3 DVD Player system Diagram
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Table1. 1389D Pin Description
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Table1. 1389D Pin Description (continued)
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Table1. 1389D Pin Description (continued)
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Table1. 1389D Pin Description (continued)
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Table1. 1389D Pin Description (continued)
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Table1. 1389D Pin Description (continued)
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Table1. 1389D Pin Description (continued)
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Table1. 1389D Pin Description (continued)
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Table1. 1389D Pin Description (continued)
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2.2. Power supply Circuit Diagram and Component Layout
Fig 2-4 Power Supply Circuit Diagram
Fig 2-5 Power Supply Assembly Drawing
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Fig 2-6 Power Supply Composite
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2.3. MPEG Circuit Diagram and Component Layout
2.3.1. MPEG Circuit Diagram
Fig 2-7 Index and Power Interface
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Fig2-8 MTK1389D & RF
Fig 2-9 SDRAM & FLASH
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Fig 2-10 Video output
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Fig 2-11 Audio output
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2.3.2. MPEG Assembly Drawing
Fig 2-12 MPEG Assembly Drawing
2.3.3. MPEG Composite
Fig2-13 MPEG Composite
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2.4. Front panel Circuit Diagram and Component Layout
Fig 2-14 Front Panel Circuit Diagram
Fig 2-15 Front Panel Assembly Drawing
Fig 2-16 Front Panel Composite
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3. Servicing Procedures
3.1. Power Supply Trouble Service Flow Chart
Power Supply
Block Trouble
NG
Check F901 Condition Replace F901
OK
Check U901 NG
Pin1/Pin2 Replace U901
Condition
OK
Check on
D101/D102/D103/D
104/D105 Output
Voltage Condition
NG
NG
Check on Q103 Pin1 Replace Q103
Voltage Condition 2~5V
NG
NG
Replace U902 Replace TR901
OK
OK
Check CON1/2
Output Voltage
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DV-900 Service Manual
3.2. Read Disc Trouble Service Flow Chart
Read disc problem in a DVD player is a very complicated issue that may
involve complex issues. This problem is not only relation to the
electronic circuit, but also very much relation to the operation
environment.
DVD loading unit is a very complicate part that contains big number of
ESD components, which require specific equipment, tools and
technique to repair; in general, service technician is not suggested to
disassemble the DVD loading unit. It is suggest proving the trouble and
replacing the complete DVD loading unit, instead of repairing the DVD
loading unit in local workshop.
It is suggested to prove the faulty of a DVD loading unit by replacement
by a good DVD loading unit.
Before checking the "NO Disc" Trouble, ensure excluding the following
possibilities:
The test disc is damage.
AC power supply voltage dropped below the minimum required
level.
DVD disc region code and color system is not matching to the DVD
player or system setting.
Moisture condensed inside the unit. (Power on the unit, without disc
loaded, for 1/2 to 2 hours).
Service Flow Chart
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3.3. Video Trouble Service Flow Chart
3.3.1. Composite Video Trouble Service Flow Chart
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3.3.2. SCART Video Trouble Service Flow Chart
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3.4. Composite Analogy Audio Trouble Service Flow Chart
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3.5. Digital Audio Trouble Service Flow Chart
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3.6. Front Control Trouble Service Flow Chart
Front Control Trouble
NG
Check between JP2 and Power Connection
OK Replace
NG
Check between JP1 and MPEG Connection
OK
NG
Check U2 Pin9/25 Voltage Check Power Supply
NG
OK
Check U2 Replace VFD
OK SEG Signal
OK
Check U1 Pin1/2/15/16 Voltage Replace U2
NG
Replace U1
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3.7. Remote Control Trouble Service Flow Chart
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4. Parts List
4.1. Power parts list
NO. PART NO. DESCRIPTION QTY LOCATION
Carbon Resistor
1 M2R1110030433110 RT14-1/4W-10R